Question:
Electronic configuration of four elements A, B, C and D are given below:
(A) \( 1s^2 2s^2 2p^3 \) → N
(B) \( 1s^2 2s^2 2p^4 \) → O
(C) \( 1s^2 2s^2 2p^5 \) → F
(D) \( 1s^2 2s^2 2p^2 \) → C
Which of the following is the correct order of increasing electronegativity (Pauling's scale)?
Electronic configuration of four elements A, B, C and D are given below:
(A) \( 1s^2 2s^2 2p^3 \) → N
(B) \( 1s^2 2s^2 2p^4 \) → O
(C) \( 1s^2 2s^2 2p^5 \) → F
(D) \( 1s^2 2s^2 2p^2 \) → C
Which of the following is the correct order of increasing electronegativity (Pauling's scale)?
(A) \( 1s^2 2s^2 2p^3 \) → N
(B) \( 1s^2 2s^2 2p^4 \) → O
(C) \( 1s^2 2s^2 2p^5 \) → F
(D) \( 1s^2 2s^2 2p^2 \) → C
Which of the following is the correct order of increasing electronegativity (Pauling's scale)?
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Just remember "FON" (Fluorine, Oxygen, Nitrogen). These are the three most electronegative elements in the entire periodic table.
Updated On: Apr 16, 2026
- A < D < B < C
- A < C < B < D
- A < B < C < D
- D < A < B < C
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Electronegativity is the tendency of an atom to attract a shared pair of electrons towards itself. Across a period in the periodic table, electronegativity increases as the nuclear charge increases and the atomic size decreases.
Step 2: Detailed Explanation:
All four elements belong to the second period of the periodic table: - D: Carbon (Group 14, \( Z=6 \)) - A: Nitrogen (Group 15, \( Z=7 \)) - B: Oxygen (Group 16, \( Z=8 \)) - C: Fluorine (Group 17, \( Z=9 \))
Across the period from left to right: C < N < O < F. [Image of periodic table trend for electronegativity]
Step 3: Final Answer
Following the periodic trend, the correct order is D < A < B < C.
Electronegativity is the tendency of an atom to attract a shared pair of electrons towards itself. Across a period in the periodic table, electronegativity increases as the nuclear charge increases and the atomic size decreases.
Step 2: Detailed Explanation:
All four elements belong to the second period of the periodic table: - D: Carbon (Group 14, \( Z=6 \)) - A: Nitrogen (Group 15, \( Z=7 \)) - B: Oxygen (Group 16, \( Z=8 \)) - C: Fluorine (Group 17, \( Z=9 \))
Across the period from left to right: C < N < O < F. [Image of periodic table trend for electronegativity]
Step 3: Final Answer
Following the periodic trend, the correct order is D < A < B < C.
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